I'm thinking the Jasper replacement block wouldn't have the same internals as a Grand National or factory Ttype block. I think its a bone stock 6cly who knows uf the swapped the heads from the original block?
The motor seems to be a Jasper replacement block. Thats the only reason I haven't bought it. I'm new to these T Types and Grand National's but I have owned about 15 1983 ton1988 Monte Carlo Super Sports.